Leader of UK opposition party urges challenger to 'think'

Britain's Labour Party leader Jeremy Corbyn ahead of his speech during the Durham Miners' Gala on the old Racecourse in Durham, England, Saturday July 9, 2016. Corbyn will face a leadership challenge from shadow cabinet minister Angela Eagle, according to an announcement on Saturday. (Scott Heppell / PA via AP) (The Associated Press)

FILE- In this file photo dated Sept. 28, 2015, Angela Eagle during a Labour Party event in London. Former shadow business secretary Eagle announced Saturday July 9, 2016, she will launch a bid to oust party leader Jeremy Corbyn, saying she would set out her "vision for the country" on upcoming Monday. (Jonathan Brady / PA FILE via AP) (The Associated Press)

The leader of Britain's opposition Labour Party leader has urged a lawmaker challenging him for the job to "think for a moment" about her decision.

Angela Eagle, the party's spokeswoman on business issues, will launch her challenge to Jeremy Corbyn on Monday amid party turmoil following voters' decision to leave the European Union.

Corbyn told the BBC on Sunday that this is the moment to offer a differing vision to the Conservatives and austerity programs. The Tories are holding a contest of their own to replace outgoing Prime Minister David Cameron, who is resigning after losing the vote.

Corbyn is in jeopardy over fears that he wouldn't be able to rally national backing to win a new election should Cameron's successor choose to call one.